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What is a Lambda execution role?

What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.

What is a Lambda execution role? An IAM role the function assumes so it can call AWS APIs. Without it, even CloudWatch Logs writes fail. Least privilege to only needed actions. Attach AWSLambdaBasicExecutionRole first; add S3/DynamoDB policies only if needed. — What is a Lambda execution role? · Download PNG

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What it is

An IAM role the function assumes so it can call AWS APIs.

Why it matters

Without it, even CloudWatch Logs writes fail. Least privilege to only needed actions.

How / example

Attach AWSLambdaBasicExecutionRole first; add S3/DynamoDB policies only if needed.

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